Article
Environmental Sciences
Wenjing Lu, Yuchen Du, Rongqiang Fu, Ming Tan, Guizhong Zhou, Veeriah Jegatheesan, Yang Zhang
Summary: In this study, electrodialysis was used to treat a colloidal saline solution, and the influence of different factors on the geometry and dynamics of colloids was investigated. The study confirmed that colloid aggregation was the cause of clogging during electrodialysis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Guangsheng Zeng, Wei Chen, Sheng Liu, Guangyi Liu
Summary: In the xanthate flotation system, the aggregation of serpentine on sulfide minerals weakens their floatability. While electrostatic attraction was assumed to be the dominant driver for serpentine slimes coating, this study proposes that the hydrophobic interaction between the talc-like cleavage plane of serpentine and the xanthate-hydrophobized surface of sulfide minerals is the dominating factor. Through experiments using optical microscopy, micro-flotation, contact angle, zeta potential, and FT-IR, the aggregation behavior and mechanism of serpentine on pyrite surface were investigated, along with the disaggregation mechanism of HEDP. The findings reveal that the hydrophobic interaction promotes the aggregation between serpentine and pyrite, while the attendance of HEDP prevents their aggregation through electrostatic repulsion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Chemical
Hongai Zheng, Meilin Zhu, Derui Wang, Yao Zhou, Xin Sun, Shuangyan Jiang, Mengyao Li, Cunzheng Xiao, Daquan Zhang, Lizhi Zhang
Summary: In this study, cellulose nanocrystal (CNCs) was incorporated onto Cu-MOF-74 and coated on a PVDF membrane to improve its anti-fouling performance. The modified membrane showed enhanced hydrophilicity, permeability, and anti-fouling performance. Additionally, it exhibited improved antibacterial efficiency due to the presence of Cu-MOF-74.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
R. Khalesi Moghaddam, S. Mhatre, H. W. Yarranton, G. Natale
Summary: Oil production and processing often involve the treatment of water-in-oil emulsions stabilized by asphaltenes. This study investigates the effect of ultrasonic waves on the interactions between asphaltene films and proposes a low-power ultrasound field as an effective method to break asphaltene-stabilized water-in-oil emulsions.
Article
Chemistry, Physical
In-Yong Suh, Young -Jun Kim, Pin Zhao, Daniel Sanghyun Cho, Minki Kang, Zheng-Yang Huo, Sang-Woo Kim
Summary: Researchers developed a novel microbial-blocking textile that uses triboelectric charges induced by harvesting kinetic energy from human motion. The textile, which has opposite triboelectric properties of the outer and inner layers, achieves efficient airborne pathogen blocking through electrostatic repulsion. This self-powered textile offers a promising method for rapid blocking of airborne pathogens with low pressure loss.
Article
Engineering, Environmental
Boyang Yu, Jingqiu Sun, Kai Zhao, Junrong Shao, Jiayu Tian, Chengzhi Hu
Summary: This study developed a novel membrane separation reactor with an Al anode and a conductive membrane as the cathode to mitigate membrane fouling. The combination of electrocoagulation and the electrokinetic effect provided an efficient method for antifouling and improved effluent quality with low maintenance.
Article
Chemistry, Multidisciplinary
Yanxin Xiang, Huanv Mao, Si-cheng Tong, Can Liu, Rui Yan, Li Zhao, Linyong Zhu, Chunyan Bao
Summary: Short peptides that respond to external stimuli have been utilized to construct hydrogels for biomedical applications. In this study, a photoactivated peptide hydrogel was developed using a photo-chemical reaction and a positively charged dipeptide. Light irradiation triggered the self-assembly of peptides and the formation of hydrogel, allowing precise control over its structure and mechanical properties. The optimized photoactivated hydrogel was suitable for cell culture and showed photocontrollable mechanical strength that regulated stem cell spreading. This strategy provides an alternative method for constructing photoactivated peptide hydrogels with broad applications in biomedicine.
Review
Materials Science, Multidisciplinary
Jose Luis Sanchez-Salvador, Hongyu Xu, Ana Balea, Carlos Negro, Angeles Blanco
Summary: Cellulose nanomaterials possess unique properties due to their colloidal behavior, which influences their self-assembly, stability mechanisms, and interaction with particles in different matrices. This review provides an overview of the latest advancements in nanocellulose research from a colloidal material perspective, focusing on controlling these properties and their impact on various applications such as drug delivery, coatings, nanocomposites, and tissue engineering.
FRONTIERS IN MATERIALS
(2023)
Article
Engineering, Chemical
Pengkun Zheng, Li Wang, Qingmiao Wang, Jiafang Zhang
Summary: Heterostructure electrodes prepared from the nanocomposite rGO/MoS2 with modified GO@PEI showed improved electrochemical properties and desalination performance, attributed to the rich heterostructure formed through van der Waals forces and chemical bonding between rGO and MoS2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
He Dong, Zhouyang Wu, Xinyuan Li, Xuhong Guo, Jun Xu
Summary: In this work, ionic liquid polymers containing the imidazole cation and/or alkyl branches were synthesized to inhibit the precipitation and deposition of asphaltenes. The alkyl branches can inhibit the aggregation of asphaltenes by forming layers, and the ionic liquid polymers can reduce the precipitation of asphaltenes by destroying the interactions between them and reducing the particle size. Additionally, the polymer with DEHP- and alkyl branches is an effective asphaltene inhibitor.
Article
Chemistry, Multidisciplinary
Yue Shao, Yong-Lei Wang, Zian Tang, Zhendong Wen, Chiawei Chang, Chunyu Wang, Dayin Sun, Yilan Ye, Dong Qiu, Yubin Ke, Feng Liu, Zhenzhong Yang
Summary: In this study, we report the large-scale synthesis of photoluminescent single-chain nanoparticles through electrostatic-mediated intramolecular crosslinking in a concentrated solution. The photoluminescent properties of these nanoparticles are strong in the visible range when non-emissive units are confined within them. The composition and microstructure of these nanoparticles can be controlled, making them useful for selectively illuminating interfacial membranes and stabilizing emulsions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Houpeng Wang, Zhaoxiang Xu, Wei Lin, Xue Yang, Xianrui Gu, Wei Zhu, Zhongbin Zhuang
Summary: The impeded mass transfer rate by gas bubbles generated on-site significantly reduces the energy conversion efficiency of the proton exchange membrane water electrolyzer. This study demonstrates that a surfactant-assistant method can accelerate the detachment of nano/micro-bubbles and the mass transfer rate, leading to an increase in overall efficiency. One specific surfactant, potassium perfluorobutyl sulfonate, shows significant promotion of activity and stability for hydrogen evolution reaction and oxygen evolution reaction in acidic medium, especially at high current density region.
Article
Chemistry, Physical
Jaber Taheri-Shakib, Mahyar Rajabi-Kochi, Akram Shabani, Ali Esfandiarian, Mohammad Afkhami Karaei, Hamid Sangbor
Summary: This study investigates the effect of four asphaltene samples on the wettability alteration of carbonate reservoir rock. The wettability of each core is evaluated using relative permeability and contact angle. The composition of asphaltene affects the degree of wettability, and sulfur and oxygen play important roles in the adsorption properties of asphaltene. The relationship between surface wettability and electrostatic properties is also explored, and calcium is found to be correlated with the level of surface wettability. Scanning electron microscopy and elemental analysis are used to study the dispersion of elements on the surface after wettability alteration.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Wendong Liu, Michael Kappl, Werner Steffen, Hans-Jurgen Butt
Summary: The addition of salt affects the shape of supraparticles, with salt concentration influencing the extent of crystallization. These changes in shape and structure are correlated with salt-dependent single colloid interaction forces. Understanding these interactions is crucial for assembly behavior during the drying process and for preparing complex supraparticles for specific applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Houpeng Wang, Zhaoxiang Xu, Wei Lin, Xue Yang, Xianrui Gu, Wei Zhu, Zhongbin Zhuang
Summary: In this study, a surfactant-assisted method is reported to accelerate the detachment of nano/micro-bubbles and promote the mass transfer rate by reducing surface tension, leading to an increase in energy conversion efficiency of the proton exchange membrane water electrolyzer (PEMWE). Among the studied surfactants, only potassium perfluorobutyl sulfonate (PPFBS) showed significant activity and stability enhancement for both hydrogen and oxygen evolution reactions (HER and OER) in the acidic medium at high current density. The addition of PPFBS reduced the HER overpotential by 22% at 0.1 A·cm(-2) and increased the current density by 31% at -0.4 V.
Article
Chemistry, Inorganic & Nuclear
Dania L. Huang, David J. Vinyard, James D. Blakemore, Sara M. Hashmi, Robert H. Crabtree
Article
Engineering, Environmental
Tiezheng Tong, Song Zhao, Chanhee Boo, Sara M. Hashmi, Menachem Elimelech
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Materials Science, Multidisciplinary
Lyndsey McMillon-Brown, Marina Mariano, YunHui L. Lin, Jinyang Li, Sara M. Hashmi, Andrey Semichaevsky, Barry P. Rand, Andre D. Taylor
ORGANIC ELECTRONICS
(2017)
Article
Engineering, Environmental
Ines Zucker, Jay R. Werber, Zachary S. Fishman, Sara M. Hashmi, Uri R. Gabinet, Xinglin Lu, Chinedum O. Osuji, Lisa D. Pfefferle, Menachem Elimelech
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2017)
Article
Chemistry, Multidisciplinary
Xi Yu, Xingchun Gou, Peng Wu, Liang Han, Daofeng Tian, Fengyi Du, Zeming Chen, Fuyao Liu, Gang Deng, Ann T. Chen, Chao Ma, Jun Liu, Sara M. Hashmi, Xing Guo, Xiaolong Wang, Haitian Zhao, Xinran Liu, Xudong Zhu, Kevin Sheth, Qianxue Chen, Louzhen Fan, Jiangbing Zhou
ADVANCED MATERIALS
(2018)
Article
Engineering, Environmental
Amanda N. Quay, Tiezhen Tong, Sara M. Hashmi, Yu Zhou, Song Zhao, Menachem Elimelech
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Ines Zucker, Sara M. Hashmi, Jason Yang, Yulian He, Lisa D. Pfefferle, Menachem Elimelech
Article
Chemistry, Physical
Mark M. Falinski, Michael A. Garland, Sara M. Hashmi, Robert L. Tanguay, Julie B. Zimmerman
Article
Engineering, Environmental
Xinglin Lu, Uri R. Gabinet, Cody L. Ritt, Xunda Feng, Akshay Deshmukh, Kohsuke Kawabata, Masashi Kaneda, Sara M. Hashmi, Chinedum O. Osuji, Menachem Elimelech
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Chemical
Humberto Jaramillo, Chanhee Boo, Sara M. Hashmi, Menachem Elimelech
Summary: The study demonstrates that modifying the RO membrane surface with a zwitterionic polymer brush can effectively delay gypsum surface nucleation and crystal adsorption compared to the control membrane, resulting in a smaller decline in water flux.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Alexander E. Siemenn, Evyatar Shaulsky, Matthew Beveridge, Tonio Buonassisi, Sara M. Hashmi, Iddo Drori
Summary: This paper presents a method utilizing Bayesian optimization and computer vision feedback loop to quickly and reliably discover control parameter values for generating optimized droplets in devices of different length scales. The method is shown to converge on optimum parameter values using only 60 images in just 2.3 hours, which is 30 times faster than previous approaches. The model implementation is demonstrated for milliscale inkjet device and microfluidics device.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Sabrina Marnoto, Sara M. Hashmi
Summary: In confined channels in low Reynolds number flow, droplets undergo various migration mechanisms including wall migration, hydrodynamic diffusion, and migration down gradients of shear. The resulting separation depends on parameters including particle size and stiffness, concentration, and flow rate. Computational methods can predict margination phenomena for specific systems, but do not generate a descriptive parametric dependence. In this paper, a scaling model is presented to elucidate the parametric dependence of margination on emulsion droplet size, volume fraction, shear rate, and suspending fluid viscosity.
Article
Multidisciplinary Sciences
Olukayode T. Majekodunmi, Sara M. Hashmi
Summary: This study investigates the clogging of rigid particles in a microfluidic device and provides novel insights into additional mechanisms to control flow losses in filtration and other confined systems.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Fluids & Plasmas
Saeed Alborzi, David Abrahamyan, Sara M. Hashmi
Summary: Understanding the clogging behavior of mixtures of soft and rigid particles in hoppers is crucial due to the increasing use of soft particles in consumer products. This study investigates the clogging phenomenon by analyzing the properties of arches formed in the hopper neck. It is found that the addition of soft particles narrows and curves the arch, as soft particles are less likely to cause clogging compared to rigid particles. The clogging probability is linearly correlated with the span of the arch, and the angles between arch particles increase with an increase in the rigid fraction. The study also provides theoretical formulations for the arch span and aspect ratio, showing that clogging probability is closely related to various geometric properties of the arch.
Article
Chemistry, Physical
Saeed Alborzi, Benjamin G. Clark, Sara M. Hashmi
Summary: This study experimentally investigated the flow and clogging of mixtures of soft and rigid particles in a hopper, finding that soft particles act as a lubricant for the flow of rigid particles, while the size of rigid particles has a greater impact on clogging.